US4214850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-capacity radial turbine
Assignee: IHI Corp
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Filing: 1978-05-23
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Granted: 1980-07-29
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Expires: 1998-05-23
Abstract
Abstract A variable-capacity radial turbine is provided with a gas flow rate control plate which may throttle a restriction of a scroll-shaped channel of a turbine casing, through which flows the exhaust gases into a turbine impeller, so that the impeller may rotate substantially at a constant speed and consequently the intake pressure may be maintained constant over a predetermined engine speed range.
Inventors
- 👤 Shojiro Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:24
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/143; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
Variable capacity radial turbine apparatus for driving a rotary blower or the like, comprising (a) a hollow casing containing (1) a central chamber having an axially arranged outlet; (2) a generally helical scroll-shaped chamber arranged concentrically about said central chamber, said scroll-shaped chamber having a tangentially arranged inlet; and (3) means defining an opening between said chambers, whereby pressure fluid from said scroll-shaped chamber may be introduced into said central chamber for driving an impeller arranged therein; (b) control means pivotally connected with said casing for pivotal movement about an axis normal to the longitudinal axis of said central chamber for controlling the effective cross-sectional area of said opening; and (c) pressure-responsive piston-motor means for adjusting the position of said control means to throttle said opening, whereby the size of said opening may be regulated as a function of the inlet pressure of said turbine.
Claim 2
Dependent Claim
145 words
Variable capacity radial turbine apparatus for driving a rotary blower or the like, comprising (a) a hollow casing containing (1) a central chamber having an axially arranged outlet; (2) a generally helical scroll-shaped chamber arranged concentrically about said central chamber, said scroll-shaped chamber having a tangentially arranged inlet; and (3) means defining an opening between said chambers, whereby pressure fluid from said scroll-shaped chamber may be introduced into said central chamber for driving an impeller arranged therein; (b) control means pivotally connected with said casing for pivotal movement about an axis normal to the longitudinal axis of said central chamber for controlling the effective cross-sectional area of said opening; and (c) pressure-responsive piston-motor means for adjusting the position of said control means to throttle said opening, whereby the size of said opening may be regulated as a function of the inlet pressure of said turbine.
Claim 3
Dependent Claim
37 words
Variable capacity radial turbine apparatus as defined in claim 1, wherein said control means comprises a generally arcuate plate member to throttle said opening extending through a given angle relative to the end of said scroll-shaped chamber.
Claim 4
Dependent Claim
40 words
Variable capacity radial turbine apparatus as defined in claim 1, wherein said control means comprises a ring member concentrically arranged relative to the longitudinal axis of said central chamber, said ring having a substantially similar configuration as said scroll-shaped chamber.
Claim 5
Dependent Claim
35 words
Variable capacity radial turbine apparatus as defined in claim 1, wherein the side wall of said casing contains a groove for receiving said control means when said control means at least partially closes said opening.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |